Mini Pneumatic Push Button Valve [mini-mod valve] - $9.99 : The Spud Gun Technology Center, Spudtech
Humphrey Online Catalog 3P
3/2 Way Valve with Push Button in Green 1/4" NPT MSV98322PP - HQC Tools - Pneumatic Supplies, Pneumatic Valves, Solenoid Valves, Air Valves, Pneumatic Cylinders.